Warp stop-motion for looms.



I. NORTHROP.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JUNE 7. 1913.

1,252,292. Patented Jan. 1,1918.

4 SHEETSSHEET 1.

J. NORTHROP'.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED mus 7. m3.

1,252,Q92 PatentedJan. 1,1918.

4 SHEETS-SHEET 2.

J. NORTHROP.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JUNE 7, 1913.

1,252,299 Patented Jan. 1,1918.

J. NORTHROP.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JUNE 7, 1913. 1,25Q g92, Patented Jan. 1,1918;

4 SHEETS-SHEET 4.

wfliraaaae av JONAS NORTHROP, .OF HOPEDALE, MASSACHUSETTS, ASSIGNOR T HOPEDALE MANU- FACTURING ,COMPANY, OF HOPEDALE, MASSACHUSETTS, A. CORPORATION OF MASSACHUSETTS.

WARP STOP-MOTION non Looms.

Application filed June 7, 1913.

To all whom it may concern:

Be it known that I, JONAS NoRTHRor, a citizen of the United States, residing at Hopedale,.in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in lVarp Stop-Motions for Looms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to an improvement in warp stop motions for looms. The object of the invention is to reorganize and improve the construction, organization and mode of operation of warp stop motions, and to these ends the invention consists in the warp stop motion hereinafter described and particularly defined in the claims.

In the accompanying drawings illustrating the preferred form of the invention,

Figure l is an end elevation of a loom showing the motion applied'thereto and omitting elements non-essential to its illustration; Fig. 2 is an enlarged elevation of a portion of Fig. 1 showing devices immediately connected with the shipper for stopping the loom; Fig. 3 is a similar view, the frame of the loom being removed for the purpose of more clearly illustrating the construction of the parts; Fig. 4 is a front elevation of the left-hand portion of the loom showing these parts as they appear from the front of the loom; Fig. 5 is a plan of the knockoff bar and showing its position with relation to the shipper lever; Fig. 6 is an enlarged portion of the drop wire supporting frame showing the drop wires and the feeler bar; and Fig. 7 is a plan view of a portion of the same.

The illustrated embodiment of the invention is described as follows 2- The loom frame 1, the cam shaft 2, the lay 3 and the breast beam 4 are or may be of the usual form. The warp leads from the warp beam 5, over the whip roll 6, over the lease rods, through the heddles, 'over the breast beam and to the take-up, in the usual manner. The warp detector devices consist of drop wires 7 held in position by rods 8 and 9 located between the lease rods 10 and 11. The lower ends of the rop wires are located between the angle bars 12 and 13 which unite the end frames 14. The feeler 15 is mounted on arms 16 carried by Specification of Letters Patent.

Patented Jan. 1, 1318.

Serial No. 772,447.

the rock shaft 17 which is oscillated by the arm 18, in turn actuated by the link 19. The warp detector devices are supported from the bars 20 which are received in the housings 21 of the end frames 14, being secured thereto by set screws. The bars 20 find support from the frame of the machine in the housings 22 mounted upon the upper ends of the rods 23, carried in the housings 24 mounted in the frame of the machine, the rods 23 being secured in the housings 24 by means of set screws, and the bars 20 being secured in the housings 2:2 by means of set screws. This supporting means affords provision for adjustment of the detector devices vertically, horizontally and align-- larly, so as to adapt the detector device to different looms. At the front of the loom the link 19' carries a notch bar 30 which is adjustably secured at 31 to the link 19. The notch bar 30 is supported on the stud 32 projected laterally from the lower end of the actuating arm 33 pivoted at its upper end in the casting 34, secured to the breast beam 4 of the loom. The upper end of the arm 33 is provided with a head 36, and a pin 37 supported in the ears 38 of the casting 34 affords a pivotal support for the arm 33. The arm 33 is oscillated upon its pivotal support by the cam lever 39 of the weft stop motion. Upon the side of the cam lever 39 is secured a casting 40 having at its upper end a pin 41 which engages a slot 42 in the arm 33. It will thus be seen that the oscillations of the cam lever through the pin 41 secured thereto impart correspond-. ingly timed oscillations to the arm 33, and that these oscillations impart a reciprocating movement to the link 19. The means for connecting the link 19 to the arm 33 are such that when a drop wire falls and arrests the motion of the feeler, the link 19 is thereby arrested while the actuating arm moves on. This connecting device consists of a slide bar 50 which is received in a hole in a-boss 51 which projects from the side of the actuating arm 33. The upper end of the slide bar 50 is pivotally. connected to the arm 52 secured to the knock-0E bar 53. The lower end of the slide bar 50 projects below the boss 51 and normally engages the notch 54 in the upper .side of the notch bar 30. The oscillations of the actuating arm 33 impart reciprocating movements to the link 19. because the weight of the slide bar 50 1s such as to hold its lower end in engagement with the notch 54. When, however, a drop wire falls and arrests the feeler 15, the link 19 is held thereby from motion and the furthermovement of the actuating arm 33 in the direction in which it is moving at the time causes the slide bar 50 to be lifted out of the notch 54:, thereby moving it endwisc and causing it to rock the knock-0d bar 53. Upon the end of the knock-off bar 53 is secured the dagger 55 which normally occupies the position indicated in Fig. 2; when the knock-ofl bar 53 is oscillated by means of the slide bar 50 it lifts the dagger 55 into operative position, bringing it into position to be engaged by the hunter 56 secured to the lay. The knock-off bar 53 is supported in a bracket 57 which is attached to the breast beam. This bracket 57 is provided with a slot 58 and the knock-off bar 53 is received in this slot. This slot is horizontal, as seen in Fig. 2, and the knock-off bar normally occupies the rear end of this slot, as shown in Fig. 5. The shipper lever 59, when in running position, occupies the position shown in Fig. 5, being held in this position by the notch in the rear side of the slot 60 in the usual manner. A spring 61 normally tends to hold the knock-off bar 53 .in its rearmost position, as shown in Fig. 5.

Now, therefore, when the slide bar 50 is raised, it rocks the knock-off bar so as to bring the dagger 55 in opposition to the bunter 56, and upon the next beat of the lay the bunter strikes the dagger and drives the knock-off bar 53 forwardly, thereby releasing the shipper 59 from engagement with the notch in the slot 60, and through the usual means, such as the lever 63 and shipper 62, throws the belt from the fast to the loose pulley, thereby stopping the loom.

It is to be observed that the feeler has a broad flat surface on top and that it is shown in Fig. 6 at the extreme right-hand limit of its throw. If now, one of the rear drop wires 7 falls, the feeler in its rearward motion will be arrested thereby and the slide bar 50 will be lifted from the notch 54 in the notch bar, thereby lifting the dagger into the path of movement of the hunter, and upon the next forward beat of the lay, the loom will be stopped. This lifting of the slide bar 50 would occur during the backward swing of the actuating arm 33, the

lower end of the slide bar'5O riding along on the upper surface of the notch bar 30. Upon the next return or forward movement of the arm 33, the link 19 moves forwardly with the actuating arm by reason of the frietion between the slide bar 50 and the upper surface of the notch bar 30. and such movement of-the link 19 continues until the feeler reaches the limit of its throw, which holds the link 19 from further movement, permitting the slide bar 50 to move over the surface of the notch bar 30 until. it reaches the notch. This movement of the link 19 first operates to move the feeler, to free the fallen drop wire, and thereafter operates to move the feeler to the other extreme of its movement, whereupon it is arrested and the link is held while the slide bar is moved along over the surface of the notch bar until it engages the notch and thereby restores the parts to their normal operative positions. The rear drop wire engages the feeler in its rearward motion and the wires of the front row of drops engage the feeler in its forward movement. The broad, flat surface of the top of the feeler operates so as to prevent the drops from engaging the feeler during the time that the feeler is directly under the drops. If, for example, a drop should fall while the feeler was under it, it would be supported upon the upper surface of the feeler until the feeler had moved out from -under it, whereupon it would fall into posimeans acting automatically to indicate a failure of warp on the back stroke of the lay and to trip the stopping means on the next forward beat of the lay. The operation of the mechanism is the same whether the feeler is arrested on its forward or backward movements; the slide bar moving to the one side or the other of the notch,,as the case may be. There is no disconnection of the link 19 from the slide bar 50, the friction between them being sufficient at all times to actuate the link except when the latter is arrested by a drop wire.

This stop motion is simple in construction and therefore cheap and adapted for attachment to or incorporation in looms at a minimum of expense. This stop motion is also simply organized in the relative arrangement of its parts and eflicient in operation, which render it not liable toget out of order. Owing to the simplicity of construction and its organization very largely, theoperation of the motion is simple and certain. The stopping of the loom upon the fall of a drop wire is accomplished by the lifting of a comparatively light slide bar which thereby rocks the knock-off bar so as to bring the dagger in the position to be struck by the hunter. The main stopping element, the shipper lever, is thereby moved to stop the loom by the intervention of only a single element, namely, the knock-off bar between it and the lay which efiects the reengagemeat of the shipper lever, and the knock-off bar itself is actuated by a single element which is lifted by the arrest of the feeler.

Having thus described the specific embodiment of the invention, which is not limited to such embodiment as it may be em bodied in her forms, what is claimed is 1, A warp stop motion for looms having, in combination, warp detectors, a feeler, a notch-bar connected with the feeler, actuating means therefor, a knock-off bar and a device for connecting the actuating means with the notch-bar movable longitudinally when the notch-bar is arrested upon the fall of a warp detector to move the knockoff bar into position for knocking off the loom. 2. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-off means, connections between the feeler and knock-oii' means including a notch-bar connected with the feeler adapted to move forwardly and backwardly, and actuating means for the notch-bar connected with the knock-off means, said notch-bar and its actuating means having provision for permitting the notch-bar to remain stationary on the backward movement of its actuating means when a fallen warp detector on warp breakage is in the path of movement of the feeler, and forpermitting the notchbar to move forward with its actuating means on the next forward movement of the latter.

' 3. A warp stop motion for looms having, in combination, warp detectors, :1 feeler, a shipper lever, a knock-off bar movable laterally to knock off the shipper lever and movable singularly to bring its dagger into position to oe struck by a banter, a cam leveiy an oscillating actuating arm connected with and actuated by the cam lever, a slide 'bar slidingly attached to the actuating arm and affording a connection not only between. such actuating arm and the feeier, but also between the feeler and the knock-off bar, substantially as described 4. A warp stop motion for looms having, in combination, warp detectors, a feeler, actuating means therefor, a shipper lever, knockoff means for the shipper lever, longitudinally moving means connecting the fceler with the actuating means and adapted, upon the arrest ofthe feeler, to move the knock-oil means into position for knocking off the shipper and a slide bar connection between the longitudinally moving means and the actuating means, having provision for movement relative to both upon the occurrence of warp breakage.

5. A warp stop motion for looms having, in combination, warp detectors, a feeler, a notcl bar connected therewith, actuating means therefor, a knockoff bar, and connecting means between the notch-bar and the knock-off bar having provision for engaging the notch in the notch-bar while the loom is operating normally and for being disengaged from the notch and sliding along the notch-bar when the notch-bar is arrested upon warp breakage.

6. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-off means, connections between the feeler and knock-oil means including a notch-bar connected with the feeler adapted to move forwardly and backwardly, and actuating means for the notch-bar connected with the knock-off means, said notch-bar and its actuating means being constructed and arranged to permit the actuating means to move backwardly relatively to the notch-bar when a fallen warp detector on warp breakage is in the path of movement of the feeler and having provision for permitting the actuating means to movethe notch-bar with it on its next forward movement.

7. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-off means, connections between the feeler and knock-oil means including a notch-bar connected with the feeler adapted to move forwardly and backwardly, and actuating means for the notch-bar connected with the knock-01f means, said notchbar and its actuating means having provision for permitting the notch-bar to remain stationary on the forward movement of its actuating means when a fallen warp detector on warp breakage is in the path of movement of the feeler and for permitting the notchbar to move backward with its actuating means on the next backward movement of the latter.

8. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-off means, connections between the feeler and knock-off means including a notch-bar connected with. the feeler adapted to move forwardly and backwardly, and actuating means for the notch-bar connected with the knock-off means, said notch-bar and its actuating means having provision for permitting the notch-bar to remain stationary .on the backward movement of its actuating means when a fallen Warp detector on warp breakage is in the path of movement of the feeler, and for permitting the notchbar to move forward with its actuating means on the next forward movement of the latter, said notch-bar and its actuating means having further provision for permit ting the notch-bar to remain stationary on the forward movement of its actuating means wnen a fallen warp detector on warp breakage is in the path of movement of the feeler and for permitting the notch-bar to move backward with its actuating means on the next backward movement of the latter.

9. A warp stop motion for lgioms having,

in combination, warp detectors, a feeler, knock-off means, connections between the feeler and knock-off means including a notch-bar connected with the feeler adapted to move forwardly and backwardly, and actuating means for the notch-bar connected with the knock-oft means, said notch-bar and its actuating means being constructed and arranged. to permit the actuating means to nlpve forwardly relatively to the notch-bar When a fallen warp detector on warp breakage is in the path of movement of the feeler and having provision for permitting the actuating means to move the notch-bar with it on its next backward movement.

10. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-ofi' means, connections between the feeler and knock-off means. including a notch-bar connected with thefeeler adapted to move forwardly and backwardly, and actuating means for the notch-bar connected with the knock-off means, said notch-bar and its actuating means being constructed and arranged to permit the actuating means to move backwardly relatively to the notch-bar when a fallen warp detector on warp breakage is in the path of movement of the feeler and having provision for permitting the actuating means to move the notch-bar with it on its next forward movement, said notchbar and its actuating means being further constructed and arranged to permit the actuating means to move forwardly relatively to the notch-bar when a fallen warp detector on warp breakage is in the path of movement of the feeler and having further provision for permitting the actuating means to move the notch-bar with it on its next backward movement; I

11. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-oil means, and connections between the feeler and the knock-oil means including a notch-bar connected with the feeler and a notch-bar actuating means connected with the, knock-0H means having provision for engagement with the notch in the notch-bar to impart a reciprocatory movement to the notch-bar during normal weaving, and for disengagement from the notch to permit the notch-bar to remain stationary when the feeler encounters a fallen detector.

12. A warp stop motion for looms, having in combination, warp detectors, a feeler,

knock-oil? means. connections between'the feeler and knock-oil means including a notch-bar and connections between the feeler and notch-bar, and means for actuating the notch-bar including a slide bar connected with the knock-oil means, said slide bar being adapted to be disengaged from the notch in the notch-bar upon the occurrence of warp breakage and to engage the notch in the notch-bar on the next movement of the notch-bar actuating means in the direction opposite to that in which the'notch-bar was IIIOVIIIO on the occurrence of warp breakage.

13. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-off means, and connections between the feeler and the knock-off means including a reciprocatory bar connected with the feeler, means connected with the knock-off means constructed and arranged to impart a recip'rocatory movement to the bar during normal weaving and to permit the bar to remain stationary when the feeler encounters a fallen warp detector, and means for actuating the bar reciprocating means.

14. A warp stop motion for looms having, in combination, warp detectors, a feeler, knockoff means, and connections between the feeler and the knock-off means including a reciprocatory member connected with the feeler, an oscillatory arm connected with the knock-off means for supporting and imparting reciprocating movements to the reciprocatory member, a cam actuated lever, and a pin and slot connection between the lever and the arm. I I

15. A warp stop motion for looms having, in combination, warp detectors, a feeler, knock-off means, and connections between the feeler and the knock-0H means including a reciprocatory notch-bar connected with the feeler, an oscillatory arm, a slide bar on the arm connected with the knock-off meansand yieldingly held in engagement with the notch in the notch-bar during normal weaving, a lever, actuating means therefor, and connections between the lever and the arm.

16. A warp stop motion for, looms having, in combination, w-arp detectors, a feeler, knock-oil" means, and connections between the feeler and the knoclcotf means including a. reciprocatory notch-bar connected with the feeler, an oscillatory arm, a slide bar on the arm connected with the knock-otf means having provision for engagement with the notch in the notch-bar during normal weaving and having provision for disengagement from the notch when the feeler encounters a fallen warp detector, a lever, actuating means therefor, and connections between the lever and the arm.

17. A warp stop motion for looms having,-

dagger into the path of the nunter to cause loom stoppage when the feeler encounters a fallen detector.

18. A warp stop motion for looms having, in combination, warp detectors, a feeler, a

notch-bar, connections between the feeler and the notch-bar, an oscillatory arm for supporting the no ch-bar, a slide bar mounted on the arm yiel ingly held in engagement with the'notch in the notch-bar during normal Weaving, a knock-off bar connected with the slide bar, a dagger supported on the knock-oil bar, a lay, a hunter carried thereby, the dagger being out of the path of movement of the bunter during normal weaving, a cam actuated lever, and pin and 19. A warp stop motion for looms having, in combination, war detectors, a feeler, a reciprocatory notchar connected-with the feeler, knock-ofi means normally in inoperative position, and actuating means for the notch-bar constituting connectionsbetween the latter and the knock-off means having provision for placing the knock-oil means in operative position when the feeler encounters a fallen warp detector.

20. A warp stop motion for looms having, in combination, warp detectors, a feeler, knockoff means, and connections "between the feeler and the knock-0E means operating when the feeler encounters a fallen detector to cause the knock-off means to stop'the loom, comprising a reciprocatory bar connected with the feeler and actuating means for the bar connected with the knock-ofi' means.

Jonas NORTHROP.

Witnesses HORACE VAN EVEREN, Fmmcrs J. V. DAKIN. 

